Atomizer.



PATENTED MAY 14 1907.

G. HOLMGREN.

' ATOMIZER.

APPLICATION 1 1mm SEPT. 2a, 1908.

. mam/11111111111 91111111111111;

. of New Jersey, have UNITED STATES PATENT-OFFICE.

' GUSTAF 'HOLMGREl ljii BLooiiF rE D, NEW JERSEY.

ATOMIZER.

To all whom it may-concern.-

Be it known that I GU's'rAF HOLMGREN, a citizen of the United tates, and a resident of Bloomfield, in the county of Essex and State invented new and useful Improvements in .Atomizers, of which the following is a specification.-

y present. invention relates to portable atomizing 'apparatus in general and particularly to devices for spraying of paint, varnish and the like. In devices of this character it is usual to supply a portable reservoir-for the material to be sprayed or atomized to which is attached an appropriate nozzle and means for forcing the paint,'varnish or other material out throu h said nozzle. These latter means preferably comprise tubes and passages disposed so as to lead compressed air in proper quantity into the reservoir 'over the material to be sprayed and-at the same time to cause another portion ofthe air to create a suction near the orifice of the nozzle. By this means the air acts both by suction and pressure upon the paint or othermaterial.

It has been found in the use of this apparatus, that when it is desired tostop the jet of atomized material, the interruption does not occur with sufficient promptitude, and the material often drips from the nozzle-tip, making use of the device disagreeable and dirty.

The presentinvention has for its principa object the suppression of this difii'culty, by making the starting and stoppage of flow sudden and instantaneous.

Another obj ect of my invention is the provision ofv a convenient means'for use in coni nection with the apparatus aforesaid whereby the means for relieving pressure may be properly adjusted.

' yinvention further includes certain novel details hereinafter described and set forth in,

my/claims.

I have illustrated one preferred form of this invention in thelaccomp'anying drawin 5, wherein igure 1 is a vertical section of a paint atomizer withcertain parts shown in side elevation the better to illustrate my improvement; Fig. 2 is a vertical section of certain details and Fig. 3 is a plan view looking upward-within the reservoir.

The container or,reservoir is shown at 1, and is provided with a cover 2 secured thereto in a Well known manner by straps 3 which also serve as a partial support for certain other parts of the device.

Patented May 14,1907.

An elastic packing 4 under the cover 2 serves to make the closure air tight. At 5 is shown the usual handle through which is led the tube 6 for supplying compressed air to the apparatus. A portion of this air passes directly out through the tube 6 to the nozzle 7, where it acts bysuction to draw'the material within the container up through the tube 8 and inner nozzle 9. The screw valve 10 is used, to close the tube 8 more or less for purposes of regulation. An-

"other portion of the compressed air is led through the tube 11 and an appropriate valve chamber 12 to the upper part of the the material-within said reservoir.

The plunger. valve whereby the flow of airis released or shut off is operated by the users thumb which presses the knob 13 inwardto release the air. The return movement of this valve forv shutting off the air is automatic.

The apparatus thus far described is already known and forms no part of my present invention. As before stated, this apparatus is often subject to the disadvantages following from sluggish interruption of operation when the a1r is cut off, whence proceeds an objectionable dripping of the material down'the sides. of. the device and -onto surrounding objects. This dripping action is caused principally by the pressure of the volume of air remaining Within the reservoir after the thumb valve is closed. This tends to expel a small amount'of material-through the tubes 8 and 9.1 In my improved device, therefore, I obviate this difficulty b supplying an additional openin from t e upper part of the reservoir 1 to tl ie outer air, and a relief valve is used whereby, during operareservoir 1, where it acts by pressure to expel 'tion, this opening is kept closed, but by,

means of which it ma be opened each time the air is cut off. My broad invention covers the use of this opening and valve however 0 erated, but I prefer to arrange the same so -t at its operation shall be automatic and so that the movement of the air cut-ofl' one way, or the other shall of itself cause appropriate action of the relief valve. While this may be accomplished in a variet of w'ays without departing from the scope 0 th s invention, prefer the construction herein illustrated, wherein an opening 14 in the cover trolled by a slide valve 15 having an appropriate opening 16 and connected to the cutoff valve by means of a rod or wire 17. The rod 17 is preferably connected to the slide valve by an easily detachable connection, as by means of the hook 18, passing through an appropriate opening in the slide valve.

In Fig. 1 is shown the position of the parts when the air is out off, While Fig. 2 shows their position during 0 eration of the atomizer. As shown in the atter position, the relief opening 14 is covered by the slide valve so that the compressed air which enters the reservoir, being confined, acts efficiently in expelling the paint or other material. On releasing the thumb piece 13, however, the cutoff valve moves automatically into the position shown in Fig. 1, cutting off access of compressed air to the device. At the same time the rod 17 draws the slide valve 15 to the right in Fig. 2 and a clear opening to the outer air is provided by the apertures 14 and 16 being made to re ister. This at once relieves the pressure 0 air over the material in the reservoir and it is thus prevented from continuing to expel surplus paint. Moreover, if this relief is made sufficiently sudden a slight inward suction is produced at the nozzle tip, whereby adhering material is drawn inward and the end of the nozzle is left absolutely clean. The sudden exit of air through the relief opening is apt to carry with it a little of the paint or other material, and for this reason I prefer to provide a small guard or hood 19 on the slide 15 covering the opening 16 and having a lateral opening only. This prevents the paint from being thrown onto the user when the relief valve is opened. In order to regulate at will the suddenness of the air relief I provide means adjustable at will for changing the size of the available opening. These means may take a variety 'o f orms but I prefer the sim le device shown in the drawings, wherein a at circular plate 20 is placed against the under surface of the cover 2 and is provided with an aperture 21 adapted to'r'egister with the relief opening 14. By turning the plate 20, the relative po sitions of the openin s 2 1 and 14 may be changed so as to modify the available vent. In the preferred form shown, the ring 20' is fastened in place by a flat cross plate 22 which is fixed to the cover 2 at the center of the ring by a thumb screw 23. The openin 21 is made in this cross plate. The thum screw is used to fix the plate 20 in any de sired position after proper adjustment of the opening 21.

Various changes may be made in the parts I of this device without departing from the limited to the details herein shown and de spray therefrom and a relief valve on said reservoir.

2. An atomizin apparatus, comprising a reservoir, means or forcing material in a spray therefrom, a cut off valve controlling said means and a relief valve on said reservoir adapted to operate simultaneously with said out off valve.

3. An atomizing apparatus, comprising a reservoir, means for orcing material in a spray therefrom, a cut off valve controlling said means, a relief valve on said reservoir and a. mechanical connection between said out off valve and said relief valve, whereby they are made to operate simultaneously.

4. In atomizing ap aratus comprising a reservoir, means for orcing material in a spray therefrom, a cut off valve anda relief valve adapted to close automatically when the cut off valve opens and vice versa.

5. An atomizin apparatus comprising a reservoir, means for forcing material in a spray therefrom, and a relief valve on-said reservoir having an adjustable opening."

6. An atomizing apparatus comprising a reservoir, a relief opening in its top, a revoluble plate placed against'said top and. having an opening adapted to register with said relief opening and means for securing said plate in various positions at will.

7. An atomi'zing apparatus comprising a reservoir having a relief openingin its to a revoluble ring having a perforated cross plhte and fitting against said top and a thumb screw passing through said cross plate for se curingit in any desired position.

8. An atomizing apparatus comprising a reservoir having a rehe opening in its top, a slide valve over said 0 emng and a means for operating said slide va ve.

9. An atomizing apparatus comprising a reservoir-having a relief opening inits top, a

slide valve over said opening and a thurnb piece for operating said valve.

10. An' atomizing apparatus comprising a.

reservoir havin a rehef opening, means for fo'rcin materia out of sa d reservoir, a cut off va ve for said means, a slide valve over said relief opening and a mechanical connection between said slide valve and said out ofi.

' 11. An atomizing ap aratus comprisin a reservoir havin a rehe opening, means for forcin materia out ofsaid reservoir, a cut off va ve for said means, a thumb piece for operating said out off, a slide valve over said relief opening and a rod connecting said slide. valve with said thumb piece.

' 12. An atomizing ap aratus comprising a reservoir having a relief opening and a slide valve ever said a sing previded with a head. 13. An atomizin ap aratus comprising a reservoir, 9. cuto va ve for the pressure agent, and a relief valve for the release of said agent from the reservoir, when the cut off valve is closed.

14. An atomizing ap )aratus Comprising a reservoir, 21, cut-011' vaive i' or the nnssuro agent, and a relief valve for the roloasv of said agent from the reservoir, the relief val-1w h0- ing open when the (cut 011' valve is closed, and closed when the cut off valveis open.

In testimony whereof, I have signed my 

